Improvement in brick-machines



4Sheets-Sheet1. D. GOLDTHRP T. HIELD.

Brick-Machines.

Patented Dec. 2,1873. l

4 Sheets--Sheet 3. D. G0 LDTH 0 R P 8L T. H l ELD.

Brick-Machines.

Patented Dec. 2,1873.

@WMM

4 Sheets--Sheet 4. D. GULDTHD R P T. H I ELD.

Brick-Machines.

Patented Dec. 2, i873.

Z @-772 au an UNITED STATEs PATENT EEiCE,

DAVID .GOLDTHORP AND THOMAS HIELD, OF HARTFORD, CONN., ASSIGNORS 0F ONE-HALF THEIR RIGHT TO JOHN B.' OLAPP, OF SAME PLACE.

IMPROVEMENT IN BRICK-MACHINES.

Specification forming partof Letters Patent No. 145,169, dated December 2, 1873; application filed v July 19, 1873.

To all whom 'it may concern:

Be it known that we, DAVID GoLDTHoRP and THonAs HIELD, of Hartford,in the county of Hartford and State of Connecticut, have invented a new and valuable Improvement in Brick-Machines; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference bein g had to the annexed drawings making a part of this specification and to the letters and figures of reference marked thereon.

Figure l of the drawings is arepresentation of our improved brick-machine by a vertical central section. Fig. 2 is a top view of the the same. Fig. 3 is an elevation of the same. Fig. 4 is a detail view. Fig. 5 is a detail view.

Our invention relates to brick-machines; and it consists of the improved construction and arrangement of a piston-gear for pressing the bricks, and of the carriage-motion for adjusting the mold-boards, as more particularly hereinafter described and claimed.

In the drawings, A represents an upright post, four of which constitute, with the aid of the cross-ties B B1 B2, theframe of my machine. The sides are closed down to the lower cross-ties B B1 by panels C C1, and on the lower cross-ties a strong bottom, D, rests, at the center of which the step of a spindle, E, has its bearing. To the upper cross-ties a metal plate, F, is fastened, which carries the bearings for the spindle E and for two horizontal crank-shafts, G and H. The plate F consists of two lyre-shaped wings, j', fastened to the ties B by screws f l of an arm, f2, and a central vertical bearing for the spindle E. The wings f are near the central bearing, and at their outside ends provided with halved horizontal bearings g g and h It for the shafts at the bottom D of the machine. The rear panel, C1, of my machine does not extend down to the bottom, but leaves a space which is partly occupied by a metal plate, I, with two vert-ical guide-strips, t', and a gate, l1. The lower end of the panel Cl is provided with a dovetailed vertical guide-bearingLy', on a plate, J, in which the shank K of the piston L moves up and down. The shank K is provided with a lateral slot, Ic, in which a lever, M, works, and thereby does the lifting of the said shank against a pin, kl, near the upper end of the slot, and the depressing against a pin, k2, below, which pin may be adjusted to any depth by inserting it in one of the holes k3 arranged in two vertical rows in the shank. The lever M is pivoted to a fulcrum-pin, m, on the plate J, and is connected, by a pivot-pin, m1, and a connecting-rod, N, to the crank Gr1 of the shaft G, which receives its rotary motion, by means of a bevel-gear,G2, from a horizontal bevelgear, E2, on the spindle E. The shank K parts, near its lower end, into two branches, K1, with horizontal 'foot-flanges k", which are fastened by screws L5 to the piston L. The said piston is constructed with the shape of a trough, with a projecting shield, t, to cover the gate I1 in its descent, and with an exchangeable foot-plate, Z1.

The chamber in which the piston works consists of the plate I2 below the gate Il, the two side plates I3 and the back plate l4 firmly fastened together and supported by the plates I2 and I. The plate I2, which is really a continuation of the plate I, recedes to a small extent from the plate I, so that the piston does not slide against it, as it does against the plate I, for which reason the vertical guidestrips 'i are more elevated from the lower plate I2.

The bottom and a part of the back of the piston-chamber consist of a 'movable or exwhich maybe moved up or down with the aid of two racks, 01, fastened thereto and operated by two pinions, 02, on a shaft, o2, with stationary bearings. A frane consisting of two longitudinal ba-rs, P, two cross-bars, p2, and a number of grate-bars, p3, is inserted with the two ends p of the said bars P into the crosstie B1, and with notches p1 on the cross-tie B2. The said frame serves as a t 1ack or tramway for the iianged wheels q of a carriage, Q, and as a support and slide for the brick-molds, which fit between the grating O and the grating p3, and are moved on the bars p3 by the said carriage. The carriage Q receives its motion by aid of two connectingrods, R, which are pivoted to the sides of the carriage, and coupled to two swivels, It', with check-nuts 9*, from two lever-arms, S, on a rock-shaft, S1. The shaft S1 is supported by two bearings, S2, fastened to the posts A. The end of the shaft S1 is provided with a rocker-arm, S3, to which an adjustable connecting-rod is pivoted, which consists of the rod T and the single-acting swivelconnection T. A lever, U, moves the said connecting-rod with the aid of a pivot-pin, t. The lever U connected with two levers, U1 U2, pivoted at al and a2, and provided with serrated surfaces a3 at their ends, which iit into each other. The lever U2 is provided near its fulcrum with a tongue, u, which bears against a step, a5, on the lever U, and thereby keeps the lever U2 in line with the lever U, and prevents its swinging down. The lever U is pivoted at u to the stand V, which is fastened to onevof the upright posts A. The lever U1 is provided with an adjustable weight, IV, which is fastened thereto by a screw, zc, and a slot, w. The fulcrums u1 and a2 are set well apart, so that the levers U1 and U2 cannot rise together unless the serrated surfaces a3 are disengaged and pass each other, which requires more or less power, according to the position of the weight NV. The lever U2 is lifted by a friction-rolle1, 71, at the end of a lever or crank, Hl, fastened to the shaft I-I, which is revolved by aid of the bevel-gears E2 and I-I2. The rise and fall of the lever U causes the forward and backward motion of the carriage Q, which moves the empty brick-1nolds under the grating O, and is provided with a checker wing, q', against which the operator pushes the molds, which are introduced through a side opening in front of the said grating.

rlhe introduction of the raw clay into the so-called pug-mill, and its preparation for the entra-nce into the pisto1'1-c11amber, are not connected with new principles and require no explanation.

The clay in the piston-chamber is forced, by the down-stroke of the piston, through the grating O into the mold-board. In order to have the molds well filled with hard-pressed clay it is necessary to have a surplus of clay in that part of the chamber which begins below the gate I1, the precise amount of which cannot wellbe regulated If the piston does tit the said lower part of its chamber, and the surplus of clay is too great, the clay which cannot be packed into the molds forces a passage between the mold and the grating, and thereby changes the measurement of the bricks and spoils the corners. This is avoided ininy machine by the receding back-plate I2 and the advanced guidestrips c', by which a space is effected between the plate l2 and the corresponding side of the piston. The said space permits the clay, after the filling of the molds, to pass up harmlessly until the stroke ofthe piston is iinished. The piston has no friction to overcome on the side opposite the plate I2, and consequently requiresless power to operate it.

The weight IV is so fastened to the lever Ul that its resistance at the serrated surfaces a aga-inst parting with the lever U2 is sufficient to operate the carriage Q. under ordinary circun'istances; but when the carriage is stopped by obstructions, which would lead to breakage if the operation of the carriage should be forced, the lever U1 cannot keep its connection with the lever U2, and both levers rise and turn around their fulcrums yul and 112, thereby allowing the roller h on the crank ll to pass without moving the lever U.

The adjustability ot' the working parts for the operation ofthe piston and incid-carriage is easily understood, and does not require special explanation.

that we claim as new, and desire to secure by Letters Patent, is

il. In the piston-chamber of a ln'ick-machine, the receding back plate I2 with the advancing guide-strips i, constructed and arranged substantially as and for the purpose set forth.

2. ln a Miek-machine, the adjustable piston-gear, consisting ot' the combination ofthe piston L, the shank l( with the pins L" k2 and the holes lf", in. connection with the lever M, the connecting-rod N, and the crank G', constructed and arranged as and for the purpose set forth.

3. In a briclmnachine, the combination, with the mold-carriage and with the operating-levers S, ofthe rods It, and the adjustable swivels R having the checlgnuts 1', all constructed and arranged substantially as specified.

4. In a carriage motion of a brick-machine, the combination of the lever U having' the fixed fulcrum u, the levers U1 U2 having fulcrums al u2 and serrated surfaces a3, the adj ustin g-weight XV, and the adjustable connect ing-rod T, all constructed and arranged substantially as specified.

In testimony that we claim the above we l have hereunto subscribed our names in the presence 'of two witnesses.

DAVID GOLDTHORP. THOHAS I-l IELD. Witnesses:

H. I). KENNE, TiroMAs VVooD, J1'. 

